You can patent form but not function. The Marlborough symbol has the form of a white isosceles triangle interfaced against a uniform red background of a specific hue. It's function was to create an instinctive rather than cognitive brand association from their customer base, like the Coke ribbon and Macca's arches.
This symbol has been replicated on Exhaust. Although I disagree with Phillip Morris deciding to proceed with their suit (and generally don't like/agree with cigarette manufacturers), the specifics of the form of the symbol that they paid someone to develop in order to simplify customer association for their brand has been replicated very closely by another company.
It seems straightforward that their lawyers could argue a patent breach.
That said, Although I haven't pre-ordered him yet, I will (I hope - if my wallet isn't in too much pain!) 'cos I think he looks awesome
